Method of purifying air.



No.840,756. PATENTED JAN. 8, 1907.

J; M. ,DIETERLE.

METHOD OF PURIFYING AIR.

APPLICATION FILED FEB. 16, 1903.

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PATENTBD JAN. 8, 1907.

J. M. DIETERLE. METHOD OF PURIFYING AIR. APPLICATION FILED FIE-3.16. 1903.

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55 pounds per square inch, from whence it com- UNITED v STATES PATENT OF IC JOHN M. DIETERLE, OF ST. LOUIS, MISSOURI. fM ETHOD OF PURIFYING AIR.

To' all whom it may concern.-

Be it known that 1, JOHN M. DIETERLE, a citizen of theUnited States, residing at the city of St. Louis and State of Missouri, have invented certain new and useful lmprovements in Methods of Purifying Air, of which i the following is a specification.

This invention relates to amethod of purifying air.

It is customary inbeer-saloons to force air, by means of a pump, either hand or hydraulic,

into an air-reservoir and thence into pipes which enter the barrel of beer from which it is desired to draw, which causes the beer to flow out from the beer-pipes which connect the barrel with the faucets at the bar. As the air thus forced into the beer-barrel, if impure, .will vitiate the beer and injure its flavor and healthfulness, it is very desirable the air surrounding same is contaminated byv many conditions, while if a ,hand-pum is used it is usually located adjacent to the iiar and the foul air of thebar-room is drawn into the pump and forced into the beer.

In the drawings, Figure 1 is an interior elevatlonal view of a box containing several parts usually used in connection with disthrough the pipe 7 an pensing beer in the manner above stated. ig. 2 is afront elevation of my improved purifying-box. Fig. 3 is a sectional view of the same. Fig. 4 is a section on line 4 4 of Fig. 3, and Fig. 5 is a section on the line 5 5 of Fig. 3.

1 indicates one of the side walls of the box, which contains within it the pump 2, purifying-box3, cleansing-solution box 4, and airreservoir 5. The ump,2 may be of any desired type; but I ave indicated one of the hydraulic class, which is operated by water admitted through the ipe 6 and takes its air if forces the air through the pipe 8 into the purifying-box 3, WhlCh is of a construction which wiIl be hereinafter" more particularly described. The air leaves the purifying-box 3 through the pipe 13 and enters the air-reservoir 5 in which the compressed air is reserved for use and the pressure maintained atany desired number of Specification of Letters Patent. Application filed IEe'Iu-uary 16. 1903 Serial No, 148,525.

Patented Jan. 8, 1907.

' municates', by means of a suitable connection,

to the barrel of beer, (not shown,) which barrel has another ipe running from it to the beer-faucet in tiie bar, said ponnections and the bar also not being shown, and the beer isforced out of the barrel through the pipe to the faucet by means of theair-pressure, as abovedescribed. 5

The air enters the air-purifying box 3 through the pipe 8 and is conducted through the lower extension of that pipe to a hollow cap 9, connected thereto by screw-threads and having a" plurality of perforations 10 therein. The lower portion of the tube 8 within the purifying-box 3 passes through a diaphragm 11, which contains a dplurality of perforations 12. The air passes ownwardly through the pipe 8 and its lower extension within the box 3 and into the hollow cap 9 and out of the perforations 1O upwardly have been carried over with it from the action of the hydraulic pump. When it rises above the glycerin, it may either make its escape directly through the pipe 13 or the u per portion of the purifying-box 3 may be lled with a mixture of roasted shale, coffee, hops, &c., for imparting a pleasant aroma to the air, which will be in turn imparted to the beer in the barrel. This flavoring mixture has been fully described by me in an application for patent copending herewith.

It is to be observed thatthe cap 9 extends substantially over the area of the cylinderbottom, thereby enabling the glycerin throughout its area to act upon the air, inasmuch as the air is thoroughly broken up and separated by said cap and is evenly distributed throughout the area of the glycerin, as distinguished from cases where the air is passed through the gl cerin from the end of a pipe, which causes t 1e air topush its waythrough the lycerin in a steady current or/stream, and %y reason of the comparative compactness of the air derives little purification by such passage. acts as a strainer, intercepting the air after its The perforated diaphragm' IUO passage through the glycerin and preventing egress of an solid matter which the airmay be possesse with.

- In this application what I claim, and desire to secure by Letters Patent, is-

The herein-described process of preparing airffor use in forcing beer from a barrel in vending the same, consisting in the following successive steps, first discharging airunder pressure into a liquid mass 0 glycerin at a multiplicity of points adjacent the bottom of the latter, splitting up said compr'essed .air into finely-divided streams, whereby said streams may individually course upwardly through said glycerin to have the moisture and impurities removed, then passing said streams of air through a strainer after they have become freed of said glycerin, then passing said air through an aroma-imparting mixture, and finally collecting the air immediately it has left said mixture and while still in a compressed state in a storage receptacle.

In testimony whereof I have affixed my si nature, in presence of two witnesses, this 14t day of February, 1903.

- JOHN M. DIETERLE. Witnesses:

ADELAIDE HENSING, MAUI) LETCHER. 

